A-16 Visit www.GemsSensors.com for most current information.
LEVEL SWITCHES – SINGLE POINT
UL Approved
Explosion-Proof
seireS0502-SL seireS00125-SL
3-7/8"±1/8"
(98.4 mm)
2-3/8"±1/8"
(60.3 mm)
1" NPT
5/8"†
(15.9 mm)
APPROX. ACTUATION LEVEL
CONTACTS TRANSFER ON
ASCENDING FLUID
LEVEL (±1/4" OF )
C
L
3-7/16"
(87.3 mm)
1/2" NPT
1-3/8"
(34.8 mm)
UP
7/8"
(22.2 mm)
4-1/8"
APPROX.
(104.8 mm)
2" DIAMETER BALL FLOAT
3-5/8"
APPROX.
(92.0 mm)
1" NPT
1"†
(25.4 mm)
APPROX. ACTUATION LEVEL CONTACTS
TRANSFER ON ASCENDING FLUID LEVEL
5-1/16"
(128.6 mm)
5-9/32"
(134.1 mm)
APPROX.
3-1/4"
(82.5 mm)
APPROX.
1" NPT
1"†
(25.4 mm)
APPROX. ACTUATION LEVEL CONTACTS
TRANSFER ON ASCENDING FLUID LEVEL
5-1/16"
(128.6 mm)
3-1/2"
DIA. REF.
13/16" REF.
1/2" NPT
PORTS
Side View
Top View
Large Size – Alloys
Side Mounting Switches Solve the Problem of Inaccessible Tank Tops & Bottoms
These units solve the problem of point level sensing in tanks with
inaccessible tops or bottoms, or at intermediate locations in larger
tanks. Operation is positive and dependable. The float pivots with
changing liquid level, displacing a shuttle which magnetically actuates
a hermetically sealed switch within the unit. Installation is through the
tank side at the detection point.
Typical Installation
LS-2050 Series – Brass and Buna N LS-2050 Series – All-Stainless Steel LS-52100 Series – All Stainless Steel
General purpose materials designed to
provide reliable service in oils and water.
Ultimate strength: for pressures to 900
PSIG and temperatures to 300°F (148.9°C).
Explosion-proof models available.
Rugged, all-stainless steel unit offers broad
chemical compatibility at temperatures to
300°F (148.9°C). Explosion-proof models
available.
Dimensions
† Approximate de-actuation level, nominal (based on a liquid specific gravity of 1.0). * Switch Mounting dimensions are the same as shown on
the LS-2050 Series drawing (far left).
Explosion-Proof Versions
CSA or FM Approved versions are available in all-stainless steel configurations only.
Typical Example (P/N 55690 Shown):
For Remote Alarms –
See Page E-29
• Adjustable Volume
• Indoor Outdoor
• Solid-State
A-17
Visit www.GemsSensors.com for most current information.
LEVEL SWITCHES – SINGLE POINT
Series
Number
Materials
Switch1
Part Numbers
Stem and
Mounting Float Other
Wetted
Standard
Versions
With Bellows
(Details Below)
Explosion-Proof
LS-2050
Brass Buna N
316 Stainless Steel,
Beryllium Copper,
Teflon®, Ceramic
SPDT, 20 VA 30288 — —
316
Stainless
Steel
316
Stainless
Steel
Stainless Steel,
Teflon®, Ceramic
SPDT, 20 VA 30290 175650 55690
SPST, 100 VA, N.O.2, 4 48068 — —
SPST, 100 VA, N.C.2, 4 48069 — —
LS-52100
316
Stainless
Steel
304
Stainless
Steel
430 Stainless Steel,
Teflon®, Ceramic
SPDT, 20 VA 52100 — 121753
SPST, 100 VA, N.O.3116971 — —
SPST, 100 VA, N.C.3116972 — —
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FM
Common Specifications
Electrical Termination: No.18 AWG, 24˝ L., Polymeric Lead Wires.
Approvals: LS-2050 Series Switches are U.L. Recognized – File No. E45168 and are CSA
Listed. Explosion-proof units are approved for Class I, Division 1, Group D hazardous areas.
Mounting Attitude: Horizontal, ±15°.
Performance
How To Order – Select Part Number based on specifications required.
Notes
1. See “Electrical Data” on Page X-5 for more information.
2. Not CSA Approved.
3. Not U.L. Recognized or CSA Approved.
4. UL Resistive Rated
– Stock Items.
FLOAT TYPE
